Steam generator



g 7 P. J. o. MILLER STEAM GENERATOR Filed Deo. 9. 1925 Patented Aug. 23, 1927.`

y UNITED ,STATES` PATENT OFFICE.

YEE'rER J. o. MILLER, or PEoRIA, ILLINOIS.

s'rEAMy GENERATOR.

f ceptacles into which waterv is showered from a source of'supply and in the'employinent of heating elements preferably electrical coils associated with said pansor receptacles for heating the same and thereby generating steam, and an egress means for conveying or carrying ofi' the steam to the'motive unit. Y* y That the invention maybe more fully understood, reference is had to the accompanying drawings forming ar part of the present description illustratinga preferred embodiment of the invention, in which:-

Figure 1 is a side Aelevation of a steam generator, showing a preferred arrangement of certain of the parts, and showing in dotted lines the water ments therewithin;

Figure 2 is a sectional view taken on the line 1V--1, Figure 1, showing the binding post connections for the conduits which conduct electricity to the elements within the steam generator; y

Figure 3 is a plan in section as the same would appear if taken on the line 3 3, Figure 1, showing a. water pipe, drip pan and electrical conductors within the generator; 1

Figure 4 is aview showing a preferred arrangement of the heating elements or electrical conductors showing the drip pan or receptacle removed, as the same would appear if taken on the line .fk-4, Figure 1;

Figure 5 is a vertical section view showl ing the relative positions of the drip pan `and heating elements, and

Figure 6 is a view of a safety or blow-off valve, shown partially in cross section.

Like characters of reference denote corresponding parts throughout the figures.

Referring to the drawings, Figure 1 discloses a boiler 1 having riveted on its ends i Application filed Iiecember `foreign matter.

pipes and heating elef the underneath side thereof a plurality of a, 1925. serieu No. 74,250.

closures 2 and 3, respectively, the same being heavily constructed for the purpose of resisting a high pressure built un thereufithin. A hand hole cover plate 4 is provided for the purpose of making entry within the boiler or generatcrl for making repairs or other necessary adjustments needed, the same being retained in place by a plurality of bolts 5. Q The lower closure 3 is shown provided with legs or standards 6, however, it isto be understood that other supporting means may be used.

A steampressure gauge 7 is provided 0n the closure 2 for purposes well known in the i art and a drain cock 8 is provided on the cloand other therein rfor the purpose of controlling thev .supply of water Within `the boiler 1, the

object of whichis to befurther described.

Referring to Figure 3, it will be seen that a union 13 has connection kwithinthe boiler 1 to the nipple 11 and connected with and extending `horizontally fromsaid union 13 is a circular waterpipe 14 and having on water escapel holes or perforations 15, as shown; l Y y Y A drip pan or receptaclel 16.best seen in 'Figure 5, is supported immediately ybelow thewater pipe 14, its relationship to the pipe 14:'being approximately asshown in Figure 1, said pan being preferably of copper material due to its quick heat conducting propersure 3 for the purpose of draining they )bottom of the boiler 1 of water ties. Said pans 16 are supported by rests of preferably nonconductive material 17 which are shapedto receive conically shaped drip pans or receptacles 16. y

The heating elements for the respective pans or receptacles 16 are designated 18 and comprise suitably constructed electrical coils which are preferably located between the rests 17 and the pansl or receptacles 16 in the manner preferably shown in Figure 5. Said vcoils are connected with conductor terminals 19 secured to binding posts 20 suitably secured through the wall of the main body of the generator, to which are connect# ed Suitable conductor terminals 211.` rllhe character and construction of the heating ele ments and the manner and form of conveying electrical energy thereto may be of any preferred construction best adapted for the uses herein intended, and may be provided with connections of suitable character leading to any of the Well known sources of supply.

I preferably support or suspend the drip pans or receptacles and their rests in suitably spaced superimposed relation by means of standards 22 shown in dotted lines in Figure l which are connected with an end closure ot the generator body. lVhile I have shown a preferred support, it is obvious that any other convenientand suitable support may be provided. Furthermore, while I have elected to show two drip pans and associated heating elements, together with a water supply ttor each, from a coinmon inlet, it is obvious that one or a plu rality of more than two may be provided.

A steam conducting pipe 28 is shown leading from the generator or boiler l and preterably connected through the end closure 2. This endclosure is also provided with a safety or blow-ott valve which in its preferred construction includes a casing 224i having an inlet opening 25 and within said casing is arranged -a slidable piston or plunger 26 having formed at its lower end the annularly arranged conduit 27 which is adapted under pressure to be brought into coincidence with an outletpipe 28 which may have connection with any suitable condenser, not shown. The cylinder 26 is provided with an antieiriction roller 29 upon which is adapted to ride a lever arm 30 to the free end of which, if desired, may be connected any suitable pressure regulating means, not shown, and said lever arm 30 has a pivotal connection at 31 with a suitable bracket 32 supported from the generator or boiler 1.

In the operation of the generator, it will be understood, that with the pipe 10 connected to a suitable source of supply and opening the globe valve 12 that water will enter the boiler through the nipples ll and into the pipe 14 and be showered upon the drip pans 16 by reason of the water holes or perforations l5 on the underneath side ot said pipe and by reason of the heating elements 18 being electrically energized, it will be readily understood that the water in the drip pans 1G will be immediately generated into steam, such steam rising within the boiler to be carried off by means o't the steam conducting pipe 23, as shown in Figure l.. It will be readily understood that the generation of steam is controlled through the regulating valve l2, in other words, if the consumption of steam is great, a larger supply or water will be needed and if the consumption of -steam be small, the necessity Jfor a supply of water will be naturally reduced. Should the pressure of steam within the boiler exceed the pressure limit, it will be further understood that the lever arm 30 will be moved by means oi the piston 27 of the safety or blow-oil valve and thereby release steam through the communicating openings and 27 and be released through the pipe 28 to any suitable condenser, not shown.

lVhat I claim is:

In a generator of the character described. in combination, a casing, a plurality of drip pans arranged in superimposed .felation Within said casing, an electrical heating coil beneath. each pan, means for electrically energizing said coils, nonconductive rests 'tor the respective coils and pans, supporting means tor said rests and pans, a water conducting pipe eonnected with the casing and a perforated pipe in the form ot a ring above each pan and connected with said pipe.

In witness whereof, I have hereunto aixed my hand this 5th day of December, 1925.`

PETER J. O. MILLER. 

